iptables 1.8.7-1ubuntu2 (s390x binary) in ubuntu impish

 The iptables/xtables framework has been replaced by nftables. You should
 consider migrating now.
 .
 iptables is the userspace command line program used to configure
 the Linux packet filtering and NAT ruleset. It is targeted towards systems
 and networks administrators.
 .
 This package contains several different utilities, the most important ones:
 .
 iptables-nft, iptables-nft-save, iptables-nft-restore (nft-based version)
 .
 iptables-legacy, iptables-legacy-save, iptables-legacy-restore (legacy version)
 .
 ip6tables-nft, ip6tables-nft-save, ip6tables-nft-restore (nft-based version)
 .
 ip6tables-legacy, ip6tables-legacy-save, ip6tables-legacy-restore (legacy version)
 .
 arptables-nft, arptables-nft-save, arptables-nft-restore (nft-based version)
 .
 ebtables-nft, ebtables-nft-save, ebtables-nft-restore (nft-based version)